EXHIBIT 12(a) TEXAS UTILITIES COMPANY COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES Year Ended December 31, ----------------------- 1997 1996 1995 1994 1993 Thousands of Dollars, Except Ratios EARNINGS: Net income before preferred dividends $ 688,437 $ 806,964 $(53,731) $ 644,682 $ 483,892 Add: Total federal income taxes 376,898 375,232 (60,035) 326,638 209,544 Fixed charges (see detail below) 854,822 851,482 732,313 752,892 782,439 ---------- ---------- -------- ---------- ---------- Total earnings $1,920,157 $2,033,678 $618,547 $1,724,212 $1,475,875 ========== ========== ======== ========== ========== FIXED CHARGES: Interest on mortgage bonds $ 439,539 $ 486,935 $527,131 $ 567,543 $ 611,090 Interest on other long-term debt 124,227 96,404 102,138 92,524 109,458 Amortization of debt discount, (premium) and expense 13,146 13,239 10,649 9,591 7,080 Amortization of loss on reacquired debt 24,753 23,124 20,881 19,379 13,283 Other interest charges 161,272 178,191 45,384 37,838 11,891 Preferred trust securities distributions 69,701 33,001 1,801 -- -- Rentals representative of the interest factor 22,184 20,588 24,329 26,017 29,637 ---------- ---------- -------- ---------- ---------- Total fixed charges $ 854,822 $ 851,482 $732,313 $ 752,892 $ 782,439 ========== ========== ======== ========== ========== RATIO OF EARNINGS TO FIXED CHARGES 2.3 2.4 0.8 2.3 1.9 === === === === ===